| http://www.w3.org/ns/prov#value | - Firstly, in various embodiments of the invention, particularly those which use e.g. a trigger to communicate movement of the plunger rod to the first stop member, the plunger rod retaining member can make it more difficult to accidentally (or intentionally) force the disengagement of the first stop member from the first indentation by e.g. jamming fingers into the gap formed between the plunger ro
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